I don't know much about mitochondrial disorders--only that there are a lot of different ones. They were testing me for Chronic Progressive External Ophthalmoplegia (CPEO), which affects the eyes and may affect other systems. Previously the diagnosis could only be confirmed by muscle biopsy. The blood test for the disorder has been around for only a year. I think Athena is the only lab in the country that performs the testing. My results were helpful with planning my course of treatment since my MG presentation has been a bit atypical. You're welcome to PM me if you have more questions.

I hope you're able to find answers soon.
Cate